Display cheat sheet for command using 'cheat' and 'tldr'

how

#!/bin/sh

#
# How - cheat and tldr
#

function usage()
{
  cat << EOF
Display cheat sheet for command using 'cheat' and 'tldr'

Usage :
  $CMDNAME <command>
  $CMDNAME -h

Options :
  -h  show usage

'cheat' and 'tldr' command of detail
  cheat -h
  tldr -h
EOF
}

### Main Logic

CMDNAME=`basename $0`
KEYWORD=$1

while getopts h OPT
do
  case $OPT in
    h) usage
       exit 1
       ;;
    \?) usage
       exit 1
       ;;
  esac
done

if [ "" = "$KEYWORD" ]; then
  usage
  exit 1
fi


echo "======================================= cheat"

cheat $KEYWORD

echo "======================================== tldr"

tldr $KEYWORD